“retrospective study”的概念、定义、翻译、参考文献-科学参考

单词	retrospective study
释义	retrospective study Encyclopedia 理学临床试验的自适应性设计释 retrospective study观察性研究在自然状态下对研究对象的特征进行观察、记录，并对结果进行描述和对比分析的研究。 Mathematics retrospective study回溯研究
随便看	matrix spectrum matrix splitting matrix splitting preconditioner matrix splitting preconditioning matrix splitting preconditioning (preconditioner) matrix square root matrix structural analysis matrix summation method matrix-supported fabric matrix sustained/controlled release preparations matrix symbol of an operator matrix theorem matrix theory matrix trace matrix transformation matrix transpose matrix tree theorem matrix unit matrix-valued matrix-valued form matrix-valued function matrix variate matrix-variate distribution matrix Viète theorem matrix with no entries

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